If you're looking for your recreational trimix diving certification, it is important to understand the differences between gas types and how they mix. Learn about Normoxic (Hypoxic) and Helioxic dives as well how to manage equipment. A good understanding of how to maintain your body posture underwater is essential. These are the most important requirements for this type certificate. For your card to be issued, you must complete several practice sessions in confined waters.
Normoxic
The IANTD Normoxic Normmix diver course is for those who wish to dive up to 60 m without breathing air. It also has a theory component as well as confined water skill practice. This course includes theory and four stages of decompression diving. Students can practice emergency procedures during these dives. Students can earn the CCR trimix certification upon completion of the course.
Technical diver training can be used to differentiate between the two levels. The bottom mix can be used by a normoxic trimix diver. In contrast, a hypoxic trimix diver must dive in a travel mix to begin their descent. This means more complicated procedures, as the diver must switch gases during the first descent. Hypoxic trimix divers may be required to dive longer as they can mix more gases.
Hypoxic
The SSI Hypoxic Trimix Diver class is the highest-ranking technical diving course. This course is advanced in techniques and uses multiple decompression systems. It also teaches proper use for travel gas. Students will also learn about technical diving's hazards and how to react in an emergency. Six of the dives will require you to use anoxia reduction equipment.
Normal air contains 20 percent to 21% oxygen. The minimum oxygen content is 18 percent. However, at sea level, breathing normal air is safe because atmospheric pressure is around one bar. Divers must use a blend of travel mixes when diving in waters with less than 18% oxygen. This will allow them to breathe deeper. For a 100 meter dive, normal air is not sufficient. Hypoxic divers need to use travel mixes in order to compensate.
Heliox
Since the Hans Keller tragedy, many myths have been created about heliox diving. Some were concerned about the slow decompression of helium and others worried about CNS effects. These myths were created by the fact that rare and expensive helium is. Hydrogen, on other hand, can be found in abundance, is inexpensive, and has very few toxicity concerns. In addition, hydrogen is safe for use at all depths.
The Navy Experimental Diving Unit was one of the first diving organizations to study the science of decompression. The first functioning heliox tables were developed by the research team more than 80 years ago. They disproved the mixed-gas myth. They have developed a decompression device that can reduce the risk of drowning while diving. Diving with heliox should follow all instructions.
Heliox 32
The Heliox 32 Trimix Diver is a perfect replacement for the Heliair diving mix. This gas is less than 21% in oxygen. This gas is less toxic than oxygen and is thus cheaper than air. It is recommended for diving at all depths. There are some things to keep in mind before you switch to this gas. Read on to learn more about this gas. It might surprise you how well it works for your particular needs.
It is important to think about the dive type you will be taking when selecting a tank. Heliox and nitrogen diver tanks should have a lower helium content, as they both release oxygen at different rates. A dive that combines both is dangerous, and it can lead to decompression sickness. Safety of a diving partner is also important, since they may be able and willing to share your weight.